His writings include ''Ka-i hentai''<!--華夷変態-->, on which he collaborated with his father; among its arguments, the ''Ka-i hentai'' describes [[Qing Dynasty]] China as having fallen to barbarian rulers, and advocates that the [[Tokugawa shogunate]] should take some kind of action to free China from their control.<ref>Schottenhammer, Angela. “Empire and Periphery? The Qing Empire’s Relations with Japan and the Ryūkyūs (1644–c. 1800), a Comparison.” ''The Medieval History Journal'' 16, no. 1 (April 1, 2013): 158n42.</ref> | His writings include ''Ka-i hentai''<!--華夷変態-->, on which he collaborated with his father; among its arguments, the ''Ka-i hentai'' describes [[Qing Dynasty]] China as having fallen to barbarian rulers, and advocates that the [[Tokugawa shogunate]] should take some kind of action to free China from their control.<ref>Schottenhammer, Angela. “Empire and Periphery? The Qing Empire’s Relations with Japan and the Ryūkyūs (1644–c. 1800), a Comparison.” ''The Medieval History Journal'' 16, no. 1 (April 1, 2013): 158n42.</ref> |